I cant connect with VPN

[moshtagh]

hi every body

I have

centos 6.6

and use pptp to create VPN but each time my connection is failed so I

check sudo tail -f /var/log/messages

and get

Aug 22 08:29:57 localhost NetworkManager[2061]: <info> Starting VPN service 'org.freedesktop.NetworkManager.pptp'...
Aug 22 08:29:57 localhost NetworkManager[2061]: <info> VPN service 'org.freedesktop.NetworkManager.pptp' started (org.freedesktop.NetworkManager.pptp), PID 14409
Aug 22 08:29:57 localhost NetworkManager[2061]: <info> VPN service 'org.freedesktop.NetworkManager.pptp' appeared, activating connections
Aug 22 08:30:07 localhost NetworkManager[2061]: <info> VPN connection 'VPN connection 5' (ConnectInteractive) reply received.
Aug 22 08:30:07 localhost NetworkManager[2061]: <info> VPN plugin state changed: starting (3)
Aug 22 08:30:07 localhost NetworkManager[2061]: <info> VPN connection 'VPN connection 5' (Connect) reply received.
Aug 22 08:30:07 localhost pppd[14418]: Warning: can't open options file /root/.ppprc: Permission denied
Aug 22 08:30:07 localhost pppd[14418]: Plugin /usr/lib/pppd/2.4.5/nm-pptp-pppd-plugin.so loaded.
Aug 22 08:30:07 localhost pppd[14418]: pppd 2.4.5 started by root, uid 0
Aug 22 08:30:07 localhost pppd[14418]: Using interface ppp0
Aug 22 08:30:07 localhost pppd[14418]: Connect: ppp0 <--> /dev/pts/3
Aug 22 08:30:07 localhost pptp[14420]: nm-pptp-service-14409 log[main:pptp.c:276]: The synchronous pptp option is NOT activated
Aug 22 08:30:07 localhost pptp[14428]: nm-pptp-service-14409 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 1 'Start-Control-Connection-Request'
Aug 22 08:30:07 localhost pptp[14428]: nm-pptp-service-14409 log[ctrlp_disp:pptp_ctrl.c:738]: Received Start Control Connection Reply
Aug 22 08:30:07 localhost pptp[14428]: nm-pptp-service-14409 log[ctrlp_disp:pptp_ctrl.c:772]: Client connection established.
Aug 22 08:30:08 localhost pptp[14428]: nm-pptp-service-14409 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request'
Aug 22 08:30:08 localhost pptp[14428]: nm-pptp-service-14409 log[ctrlp_disp:pptp_ctrl.c:857]: Received Outgoing Call Reply.
Aug 22 08:30:08 localhost pptp[14428]: nm-pptp-service-14409 log[ctrlp_disp:pptp_ctrl.c:896]: Outgoing call established (call ID 0, peer's call ID 667).
Aug 22 08:30:08 localhost pptp[14420]: nm-pptp-service-14409 log[decaps_gre:pptp_gre.c:407]: buffering packet 4 (expecting 3, lost or reordered)
Aug 22 08:30:08 localhost pppd[14418]: MS-CHAP authentication failed: bad username or password
Aug 22 08:30:08 localhost pppd[14418]: CHAP authentication failed
Aug 22 08:30:09 localhost pptp[14428]: nm-pptp-service-14409 log[pptp_read_some:pptp_ctrl.c:543]: read returned zero, peer has closed
Aug 22 08:30:09 localhost pptp[14428]: nm-pptp-service-14409 log[callmgr_main:pptp_callmgr.c:255]: Closing connection (shutdown)
Aug 22 08:30:09 localhost pptp[14428]: nm-pptp-service-14409 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 12 'Call-Clear-Request'
Aug 22 08:30:09 localhost pptp[14428]: nm-pptp-service-14409 log[pptp_read_some:pptp_ctrl.c:543]: read returned zero, peer has closed
Aug 22 08:30:09 localhost pptp[14428]: nm-pptp-service-14409 log[call_callback:pptp_callmgr.c:78]: Closing connection (call state)
Aug 22 08:30:09 localhost pppd[14418]: Modem hangup
Aug 22 08:30:09 localhost pppd[14418]: Connection terminated.
Aug 22 08:30:09 localhost NetworkManager[2061]: <warn> VPN plugin failed: connect-failed (1)
Aug 22 08:30:09 localhost pppd[14418]: Exit.
Aug 22 08:30:09 localhost NetworkManager[2061]: <warn> VPN plugin failed: connect-failed (1)
Aug 22 08:30:09 localhost NetworkManager[2061]: <warn> VPN plugin failed: connect-failed (1)
Aug 22 08:30:09 localhost NetworkManager[2061]: <info> VPN plugin state changed: stopped (6)
Aug 22 08:30:09 localhost NetworkManager[2061]: <info> VPN plugin state change reason: unknown (0)
Aug 22 08:30:09 localhost NetworkManager[2061]: <warn> error disconnecting VPN: Could not process the request because no VPN connection was active.
Aug 22 08:30:09 localhost NetworkManager[2061]: <info> Policy set 'Auto net' (wlan0) as default for IPv4 routing and DNS.

[aks]

I'd guess these lines are the source of your problem(s):

Aug 22 08:30:07 localhost pppd[14418]: Warning: can't open options file /root/.ppprc: Permission denied

and then further on:

Aug 22 08:30:08 localhost pppd[14418]: MS-CHAP authentication failed: bad username or password
Aug 22 08:30:08 localhost pppd[14418]: CHAP authentication failed
Aug 22 08:30:09 localhost pptp[14428]: nm-pptp-service-14409 log[pptp_read_some:pptp_ctrl.c:543]: read returned zero, peer has closed
Aug 22 08:30:09 localhost pptp[14428]: nm-pptp-service-14409 log[callmgr_main:pptp_callmgr.c:255]: Closing connection (shutdown)